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nMirino STATES ArtNr GEORGE W. THAYER, OF LAKE CITY, MINNESOTA.

SPECIFICATION forming part of Letters Patent No. 228,489, dated June 8, 1880.

Application filed April 7, 1830.

To all whom it may concern Be it known that I, GEORGE W. TnAYER, of Lake City, iny the county of Wabashaw and State of Minnesota, have invented certain Improvements in Attachments to Farm or Portable Engine Boilers for Burning Straw as Fuel; and the invention consists in the construction of the device and its combination with such engine-boiler, as above cited.

In the drawings, Figure l represents a broken view of a furnace and boiler of a portable engine and my improvement attached thereto. Fig. 2 represents an upright Vsectional View of my device. Fig. 3 is4 a front view of the faceplate of a furnace andboiler of a portable or farm engine.

A represents the sheet-metal body of my device, having a projecting flange, a, to t into the fuel-openin g of a common portable-en gine boiler, and another projecting flange, a', to enter into the draft or cold-air opening into the ash-pit of the engine-boiler and through the openings E and E of face-plate D' of the furnace D.

B is the receiving-chamber for the straw, which is forced therein through the opening closed by door c into said chamber, where it is burned, the flame of the burning straw passders of the partially-burned straw that fall into the ash-pit B. By opening the door b', a draft is formed by the admission of air from the outside through ash-pit B', and through the hanged opening a' in opening E of the plate D', thence under and through the grate of the furnace to the combustion -chamber,

(Model.)

on that can be placed upon the projecting pin a" at the rear end of the attachment A, so that the door may be held closed or open to admit the requisite amount of draftthrough the ashnit.

Fis a weight suspended in chamber B by rod F', which rod extends above the jacket of chamber B, and has a knob, f, at its y upper end and holes, f', to receive a pin, f, to hold the weight at the proper height while the chamber B is being charged with fresh straw.

f3 is a supporting-bridge xed upon jacket A, and when pin f is in any of the holes f the weight F is supported on the bridge f3, as seen in Fig; 2.

After chamber B is ch'arged with fresh straw the pin f is withdrawn from rod F', and the full force of the weight bears upon the loose straw and compacts it, and thereby the straw is in better condition to be consumed, and as the straw is burned the weight settles down upon the partially-consumed straw, which is in the condition of incandescent cinder, and when cold air is admitted through the door b into the ash-pit in contact with such cinder in a pressed condition it acts to intensify the heat thereof and to expend it to great advantage. in contact with the boiler, thus increasing the heating capacity of the straw as fuel. rIhis compactin g the straw and ci n der while burning is of great advantage when either high winds or wet weather prevail, as it effects a more perfect combustion of the straw and cinder.

O represents wheels under the attachment A, having the ordinary axle c. c c are arms irmly secured to the under side of the attachment A, thence extending to the axle c of wheels C, where they are removably attached to said axle.

d d are strong eyes securely fixed to faceever the object is to burn straw, or its equivalent for fuel; but when other fuel, such as Wood, is used in the furnace, then the hookrods d are released from the eyes d, and the device A can be removed from the engine upon lthe wheels C. Thus the attachment is a portable device Whether attached to the engine or detached from it.

Having thus described my invention, what I claim isl. In a removable and portable attachment to a furnace, D, the sheet-metal device A, having,r the chamber B, Weight E, ash-pit B', projection b, flanged openings a and a', and doors a, and b', in combination with. rods d and eyes 

